Insulating collector or distributer spool



L. STEINBERGER. INSULATING COLLECTOR 0R DISTRIBUTER SPOOL. APPLICATIONFILED MAR. 20, 1917.;

1,339,9 8, Patented May 11,1920. j;

14 TORNE LOUIS STEINBERGER, OF BROOKLYN, NEW YORK.

INSULATING COLLECTOR 0R DISTRIBUTER SPOOL.

Specification of Letters Patent. P t ted May 11, 1920.

Application filed March 20, 1917. Serial No. 156,011.

To all whom it may concern:

Be it known that I, LOUIS S'rnmennenn, a citizen of the United States,and a resident of the borough of Brooklyn, county of Kings, city andState of New York, have invented certain new and useful Improvements inInsulating Collector or Distributor Spools, of which the following is aspecification.

My invention may be particularly described as a high tension collectoror distributer spool and it relates generally to improvements ininsulating devices of the spool type which are to be used in combination with co-acting brushes in automobile installation.

One of the objects of my invention is to provide an insulator of thetype disclosed so constructed as to cause the wearing surface of theinsulator to be free from dirt and dust and foreign material, thepresence of which would have a deleterious effect.

Another object is to provide an extended surface of insulating materialto effectually lessen the danger of short circuiting.

Other objects will appear from the following description and claims.

Referring to the drawings:

Figure 1 is a Vertical section of one form of my device.

Fig. 2 is a sectional view on the line 22 of Fig. l.

Fig. 3 is a vertical section through another form of my device.

Figv 4: is a vertical section through still another form of my device.

In the drawings like reference characters refer to like parts.

10 is the body or bobbin portion and 11 and 12 are the flanges extendingcircumferentially and radiallyfrom each side of the body portion. In theform shown in Fig. 1 both surfaces of each'flange are provided with aseries of concentric steps 13 so arranged that the thickest portion of aflange is at its base, the thickness progressively decreasing step bystep to its periphery; In the form shown in Fig. 3 the inner surfaceonly of each flange is provided with a series of concentric steps 13 asshown.

The annular steps formed on the sides of the flanges are cylindrical andare provided with vertical sides thus forming at any point right anglesrespectively between the sides and the tops of the steps.

Embedded in the outer surface of the may consist of a complete ring 15extending entirely a round the body portion of the spool as shown inFigs. 3 and 4. In that form of device where a sector of metal isinserted in the surface of the body portion of the spool as shown inFigs. 1 and 2, the insulating material is so molded as to form with themetal surface a continuous path around the body portion of the spool.The radial distances of the surface of the metal insert 14: and thesurface of the raised portion 16 of the insulating material whichprojects from the body portion are equal to each other. Between eachflange and the metal insert and the continuing insulating portion abovereferred to, are formed circumferential grooves or gutters 17 and 18 forthe purpose of receiving dust, dirt and accumulated matter during theoperation of the insulator and permitting the same to be readily thrownoff by centrifugal force when the spool is operating. A central hole oropening 19 is provided in all the forms shown in which may be insertedthe means for mounting the spool.

The stepped formation is begun at points on both sides of the metallicring thus forming a depression or groove upon each side of the saidmetallic ring. The stepped formation is continued throughout the sidesof the flanges of the spool and this produces a very desirable result inthat the carbon powder, which is ground from the brush, oil and dust,and so forth, is thrown off from the upper surfaces of the steps bycentrifugal force when the spool is in operation, and thus prevents theformation of a conducting path. The stepped formation on the flanges ofthe spool starts at a surface which is somewhat below the conductingring or segment, and from there on it con tinues to the upper portion ofthe flange and in the form shown in Fig. 1 it continues on the outsidesurface of the flange.

The stepped formation designed by me increases the surface and thuslessens the likelihood of the current arcing over to ground.

Another very desirable effect of the annular steps is to dispose of thedust and so forth that may form on the upper surface of the steps, andthus the surfaces are kept clean. The deleterious material due to dustand oil will not rest upon the upper surfaces of the steps because itwill then be thrown off of the surfaces due to centrifugal force whenthe spool is rotating when in use.

In Fig. 4, I have shown an insulating device provided with threecircumferential radially extending flanges 20, 21 and 22, two of theflanges 20 and 22 extending from the outer ends of the body of thedevice and the third flange 21 extending from the body midway betweenthe outer flanges. The central flange is double the thickness of eitherof the outer flanges and is provided on each surface with a series ofcircumferential steps 23, the flange progressively decreasing inthickness step by step from its base to its periphery.

The outer flanges 20 and 22 are provided on their inner surfaces with aformation similar to that on each of the surfaces of the inner flange,and the outer surfaces of the body and flanges are smooth, which latterconstruction is also shown in Fig. 3.

In the central hole 19 of the construction shown in Fig. 4 I provide alining of suitable material preferably metal, which is in the form of atube 30 disposed within the center of the insulator and fitting closelythereto as shown.

The insulating portions of my device may be made of any approvedinsulating material, but I prefer to use in this construction a materialknown in the art as electrose.

It is to be understood that the above description and drawings aremerely illustrative and the invention is not to be limited in anyrespect, except as defined in the subjoined claims.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent, is:

1. In a spool insulator, a body portion of insulating material, saidinsulator having an axis of rotation and provided with a plurality ofcircumferential flanges of insulating material radially extendingtherefrom, a metal strip secured to the surface of said body portion,between adjacent flanges, the contour of said flanges being serrated toextend or enlarge the surface area thereof.

2. A spool insulator provided with circumferential radially extendingflanges, the surface of a flange being lengthened by an annular stepformation consisting of a series of cylindrical and vertical surfaces, araised metallic portion and a raised insulation portion in the bodybetween the flanges, the shape in cross section of the raised metallicportion being similar to that of the raised insulation portion, theraised metallic and insulation portions extending entirely around thecentral portion of the body, forming a gutter or groove between theraised surfaces and the flange.

3. A spool insulator provided with circumferential radially extendingflanges having both surfaces of a flange lengthened by an annular stepformation consisting of a series of cylindrical and vertical surfaces, ametal strip secured to the body of the spool extending partiallytherearound, a portion of the metal strip being raised from the surfaceof the body, a body of insulating material of the same width and heightas the exposed body of metal situated between the extremities of themetal strip, formin grooves between the flanges and the sides 0 theexposed portion of metal and the raised portion of insulating materialencircling the body of the spool.

4. In a spool insulator, a body portion of insulating material, saidinsulator having an axis of rotation and provided with a plurality ofcircumferential flanges of insulating material radially extending fromthe said body portion, a metal strip secured to the surface of said bodyportion between adjacent flanges, the said flanges having their surfacesformed in a series of annular steps, each step including a cylindricalsurface, said cylindrical surface being parallel to said axis ofrotation of said spool, all points of said cylindrical surface beingequally distant from said axis of rotation of the spool.

5. In a spool insulator, a body portion of insulating material, saidinsulator having an axis of rotation and provided with a plurality ofcircumferential flanges of insulating material radially extending fromthe said body portion, a metal strip secured to the surface of said bodyportion between adjacent flanges, said flanges having their surfacesformed into a plurality of cylinders, the surface of each of saidcylinders being parallel to said axis of rotation, and all points oneach cylinder being equally distant from said axis of rotation of thespool.

6. A spool insulator provided with circumferentially arranged flanges, araised metallic surface in the body portion between the flanges and araised insulating surface in the body portion between the flanges andbetween the extremities of the metallic surface, providing annulargrooves between the flanges of the said raised metallic and insulatingsurfaces.

7. A spool insulator provided with circumferentially arranged flanges, araised metallic surface in the body portion between the flanges, araised insulation surface in the body portion between the flanges andbetween the extremities of said metallic surface, forming groovesbetween the circumferentially arranged flanges and the sides of thecentrally raised metallic and insulating surfaces.

8. In a spool insulator, a body portion of insulating material, saidinsulator having an axis of rotation and provided with a plural ity ofcircumferential flanges of insulating material radially extending fromsaid body portion, a metal strip secured to the surface of said bodyportion between adjacent fianges, said flanges having their surfacesformed into a series of annular steps, each step comprising vertical andcylin- 10 drical surfaces, each of. said cylindrical surfaces beingparallel to said axis of rotation of the spool.

In witness whereof I have hereunto set my hand at the borough ofManhattan, city,

county and State of New York, this 19th 15 day of March, 1917.

LOUIS STEINBERGER. In presence of IsABnL R. RICHARDS, ZITA M. GRAHAM.

